Hyunjung Choi

Utransfer-US (Global Remittance Service) Utransfer (Global Exchange & Remittance Service)

• Developed and maintained the Utransfer-US Android application for international remittance between Korea and the U.S.
• Team Size: 2 Android developers
• Contribution: 40%
• Responsibilities: Implemented Facebook login and user registration.
  Developed key features including home screen banners, remittance account management, personal settings, and multi-language support.
  Integrated app settings and user account deletion features.
• Tech Stack: Android Studio, Kotlin, Multi-Module, Clean Architecture, MVVM, Jetpack, Coroutines, Flow, Hilt, Retrofit, Git, GitLab, Figma, Slack
• Key Takeaways: Gained experience in setting up and releasing a commercial service from the early development stage.
  Improved project efficiency through daily scrum meetings.
  Introduced 'Chucker' HTTP Interceptor to enhance development productivity.
  Strengthened communication with planning, backend, and web teams.
  

Utransfer

• Maintained and refactored the legacy Android application for global remittance.
• Team Size: 2 Android developers
• Contribution: 80%
• Responsibilities: Performed overall app maintenance and legacy code refactoring.
• Tech Stack: Android Studio, Kotlin, WebView, Git, GitLab, Slack
• Key Takeaways: Gained experience with hybrid web applications.
  Improved understanding of Android-Web communication.
  Enhanced ability to read and refactor legacy code.
  Learned the importance of writing maintainable code through real user issue handling.

ConnectDoc (Real-time Patient Monitoring Service)

• Developed and maintained the ConnectDoc Android application for real-time patient monitoring.
• Team Size: 2 Android developers
• Contribution: 40%
• Responsibilities: Implemented email-based user registration and login.
  Developed personal settings features and performed app maintenance.
• Tech Stack: Android Studio, Kotlin, Multi-Module, Clean Architecture, MVVM, Jetpack, Coroutines, Hilt, Retrofit, Git, GitHub, Datadog, Figma, Slack
• Key Takeaways: Gained in-depth knowledge of email authentication and login flows.
  Improved understanding of Android UI while developing personal settings features.
  Learned how to monitor and maintain apps using Datadog.
  

Brain Saegim (English Learning App)

• Performed execution tests (QA) for the Brain Saegim English learning app.
• Conducted functional and performance testing for BR8300 new device release.
• Executed test cases and usability tests, ensuring optimal user experience.
• Key Takeaways: Inspired to pursue a career as an Android Developer.
  Gained a deep understanding of Android app testing methodologies.
  Developed a strong focus on bug-free, maintainable development.
  Learned to anticipate and handle edge cases in Android applications.
  Understood the impact of minor bugs on user experience and usability.